Question

A rifle with a mass of 12 g, traveling with a speed of 425 m/s strikes a large wooden block, which it penetrates to a depth of 15 cm. determine the magnitude of the retarding force that acts on the bullet.

Answers

workdone is done against bullet by block,Fd which equals its kinetic energy of bullet to stop it F*0.15=1/2*0.012*425^2 F=1083.75/0.15=7225N

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